– 1 (32 oz.) bag of frozen meatballs
– 2 medium yellow onions, thinly sliced
– 4 cups of beef broth
– 1 tablespoon of Worcestershire sauce
– 2 teaspoons of garlic powder
– 1 teaspoon of thyme
– 1 cup of shredded Swiss cheese
– 2 tablespoons of butter
– Salt and black pepper to taste
– Fresh parsley for garnish (optional)